Here is the full list of all 15 Music Killer achievements.
Crush 1,000 skulls.
Win, but don't lose any health.
Slay 100 dragons.
Destroy 100 UFOs.
Terminate 100 spiders.
Disassemble 100 neurobots.
Expel 100 ghosts.
Win, but don't hurt anything.
Win.
Lose.
Win cooperative match.
Do 100 combo.
Play 10 matches.
Collect 5,000 crystals.
Do a stomp jump.